/* ============================================
   PDF TOOLKIT - COMPLETE STYLES
   ============================================ */

:root {
    --primary: #e74c3c;
    --primary-dark: #c0392b;
    --primary-light: #fde8e5;
    --success: #28a745;
    --danger: #dc3545;
    --gray: #6c757d;
    --gray-bg: #f8f9fa;
    --gray-border: #e0e0e0;
    --text: #1a1a2e;
    --text-light: #6c757d;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
}

.pdf-wrapper {
    padding: 20px;
    max-width: 1400px;
    margin: 0 auto;
    min-height: calc(100vh - 200px);
}

.pdf-container {
    background: #ffffff;
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
}

.pdf-header {
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px solid #f0f0f0;
}

.pdf-header h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text);
    margin: 0;
}

.pdf-header .subtitle {
    color: var(--text-light);
    font-size: 15px;
    margin: 4px 0 0 0;
}

/* Tabs */
.pdf-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 10px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 10px 20px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-light);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.tab-btn:hover {
    background: var(--gray-bg);
    color: var(--text);
}

.tab-btn.active {
    background: var(--primary);
    color: white;
}

.tab-btn i {
    font-size: 16px;
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Grid */
.pdf-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.input-section, .output-section {
    display: flex;
    flex-direction: column;
}

.input-section label, .output-section label {
    font-weight: 600;
    color: var(--text);
    margin-bottom: 10px;
    font-size: 15px;
}

/* File Drop Zone */
.file-drop-zone {
    border: 2px dashed var(--gray-border);
    border-radius: var(--radius);
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: #fafafa;
    position: relative;
    min-height: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.file-drop-zone:hover {
    border-color: var(--primary);
    background: var(--primary-light);
}

.file-drop-zone.dragover {
    border-color: var(--primary);
    background: var(--primary-light);
}

.file-drop-zone i {
    font-size: 36px;
    color: var(--primary);
    margin-bottom: 8px;
}

.file-drop-zone p {
    color: var(--text-light);
    margin: 0;
    font-size: 14px;
}

.file-drop-zone input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

/* File List */
.file-list {
    margin-top: 10px;
    max-height: 150px;
    overflow-y: auto;
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: var(--gray-bg);
    border-radius: var(--radius-sm);
    margin-bottom: 4px;
    font-size: 13px;
}

.file-item .file-name {
    display: flex;
    align-items: center;
    gap: 8px;
}

.file-item .file-name i {
    color: var(--primary);
}

.file-item .file-size {
    color: var(--text-light);
    font-size: 12px;
}

.file-item .file-remove {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    font-size: 16px;
    padding: 0 5px;
}

/* Options */
.split-options, .compress-options, .convert-options, .protect-options {
    margin-top: 12px;
    padding: 12px;
    background: var(--gray-bg);
    border-radius: var(--radius-sm);
}

.split-options label, .compress-options label, .convert-options label, .protect-options label {
    font-weight: 500;
    color: var(--text);
    font-size: 14px;
}

.split-radio {
    display: flex;
    gap: 15px;
    margin-top: 5px;
}

.split-radio label {
    font-weight: 400;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.split-radio input[type="radio"] {
    accent-color: var(--primary);
}

#pageRangeInput input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--gray-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
}

#pageRangeInput small {
    display: block;
    color: var(--text-light);
    font-size: 12px;
    margin-top: 4px;
}

.compress-options select, .convert-options select {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--gray-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    margin-top: 5px;
}

.password-group input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--gray-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    margin-top: 5px;
}

.permissions {
    margin-top: 10px;
}

.permissions label {
    font-weight: 400;
    font-size: 13px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    margin-right: 15px;
}

.permissions input[type="checkbox"] {
    accent-color: var(--primary);
}

/* Buttons */
.button-group {
    display: flex;
    gap: 10px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.button-group button {
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 500;
    font-size: 14px;
    transition: var(--transition);
    flex: 1;
    min-width: 100px;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

.btn-download {
    background: var(--success);
    color: white;
}

.btn-download:hover {
    background: #218838;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.3);
}

.btn-clear {
    background: var(--danger);
    color: white;
}

.btn-clear:hover {
    background: #c82333;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(220, 53, 69, 0.3);
}

/* Preview Placeholder */
.preview-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    background: var(--gray-bg);
    border-radius: var(--radius-sm);
    border: 2px dashed var(--gray-border);
    color: #bbb;
}

.preview-placeholder i {
    font-size: 48px;
    margin-bottom: 10px;
}

.preview-placeholder p {
    margin: 0;
    font-size: 14px;
}

/* Compress Stats */
.compress-stats {
    display: flex;
    gap: 20px;
    padding: 12px 15px;
    background: var(--gray-bg);
    border-radius: var(--radius-sm);
    margin-bottom: 10px;
}

.compress-stats span {
    font-size: 14px;
    color: var(--text-light);
}

.compress-stats strong {
    color: var(--text);
}

/* Toast */
.toast {
    visibility: hidden;
    min-width: 280px;
    background: #333;
    color: #fff;
    text-align: center;
    border-radius: var(--radius-sm);
    padding: 14px 20px;
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    z-index: 9999;
    opacity: 0;
    transition: all 0.4s ease;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    font-weight: 500;
    font-size: 14px;
}

.toast.show {
    visibility: visible;
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    background: var(--success);
}
.toast.error {
    background: var(--danger);
}
.toast.info {
    background: var(--primary);
}

/* Responsive */
@media (max-width: 992px) {
    .pdf-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .pdf-wrapper {
        padding: 12px;
    }
    
    .pdf-container {
        padding: 16px;
    }
    
    .pdf-header h1 {
        font-size: 22px;
    }
}

@media (max-width: 600px) {
    .pdf-tabs {
        flex-direction: column;
        gap: 4px;
    }
    
    .tab-btn {
        justify-content: center;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    .button-group button {
        width: 100%;
    }
    
    .file-drop-zone {
        padding: 20px;
        min-height: 80px;
    }
    
    .file-drop-zone i {
        font-size: 28px;
    }
    
    .compress-stats {
        flex-direction: column;
        gap: 5px;
    }
    
    .permissions {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .toast {
        min-width: 200px;
        font-size: 13px;
        padding: 12px 16px;
        left: 16px;
        right: 16px;
        transform: translateX(0) translateY(20px);
        width: auto;
    }
    
    .toast.show {
        transform: translateX(0) translateY(0);
    }
}

/* Edit Tab Styles */
.edit-options {
    margin-top: 12px;
    padding: 12px;
    background: var(--gray-bg);
    border-radius: var(--radius-sm);
}

.edit-options label {
    font-weight: 500;
    color: var(--text);
    font-size: 14px;
}

.edit-checkboxes {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 8px;
}

.edit-checkboxes label {
    font-weight: 400;
    font-size: 13px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.edit-checkboxes input[type="checkbox"] {
    accent-color: var(--primary);
}

#editPageRange input, #editWatermarkText input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--gray-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
}

#editPageRange small {
    display: block;
    color: var(--text-light);
    font-size: 12px;
    margin-top: 4px;
}